with previously registered route: Only one parameter is allowed per path segmentParameters must be registered with a valid nameCatch-all parameters are only allowed at the end of a routecapacity overflowTrustedLen iterator's size hint is not exact: unsafe precondition(s) violated: Vec::from_raw_parts_in requires that length <= capacity

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.unsafe precondition(s) violated: Vec::set_len requires that new_len <= capacity()

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.